Wheel spoke



FIG. 1 is a perspective view of a wheel spoke showing my design;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image thereof;

FIG. 3 is a cross-sectional view shown along the line 3—3 in FIG. 2; and,

FIG. 4 is a cross-sectional view shown along the line 4—4 in FIG. 2.

The broken lines shown in FIGS. 1-3 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a wheel spoke, as shown and described. 